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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS5631798
Kind Code:
B2
Application Number:
JP6628675A
Publication Date:
July 23, 1981
Filing Date:
May 31, 1975
Export Citation:
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International Classes:
H04J4/00; H04L5/22; H04L7/06; H04L27/10; H04Q9/12; H04Q9/14